With Oracle's patent and copyright infringement lawsuit against Google scheduled to go to trial on April 16, the judge overseeing the case recently ordered the two companies to hold one final round of settlement talks. But those talks have failed and the trial will proceed as scheduled, it was revealed today.

"Despite their diligent efforts and those of their able counsel, the parties have reached an irreconcilable impasse in their settlement discussions," Judge Paul Grewal of US District Court for the Northern California wrote Monday. "No further conferences shall be convened. The parties should instead direct their entire attention to the preparation of their trial presentations."

Oracle alleges that Google violated Java patents and copyrights in developing the Android operating system. In addition to the settlement talks, Oracle and Google were asked to propose methods of streamlining the trial, which is expected to last eight weeks. Google proposed a damages payment to Oracle of $2.8 million, to be paid in the event Oracle proves patent infringement, but Oracle rejected the offer as being too low, Reuters reported.

The numbers provided by Google in its damages proposal suggest that Google earned $550 million in revenue from Android between 2008 and 2011, according to a story in the Guardian. That estimate has not been confirmed, however. Oracle wants hundreds of millions of dollars in damages.